166011623 has 2 divisors, whose sum is σ = 166011624. Its totient is φ = 166011622.

The previous prime is 166011557. The next prime is 166011653. The reversal of 166011623 is 326110661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166011623 - 2¹⁴ = 165995239 is a prime.

It is equal to p_9292301 and since 166011623 and 9292301 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 166011592 and 166011601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166011653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83005811 + 83005812.

It is an arithmetic number, because the mean of its divisors is an integer number (83005812).

Almost surely, 2^166011623 is an apocalyptic number.

166011623 is a deficient number, since it is larger than the sum of its proper divisors (1).

166011623 is an equidigital number, since it uses as much as digits as its factorization.

166011623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 166011623 is about 12884.5497787078. The cubic root of 166011623 is about 549.5992927051.

The spelling of 166011623 in words is "one hundred sixty-six million, eleven thousand, six hundred twenty-three".